Book-holder



(ModeL) LA VERNE. W. NOYES.

BOOK HOLDER.

No. 349,660. Patented Sept 21, 1886 mfizasses. D Y fizz/ 22567; f

MQW I wwiiwg UNITED STATES;

PATENT OFF E.

LA VERNE \V. NOYES, OF CHICAGO, ILLINOIS.

BOOK-HOLDER.

C CA I forming part of Letters Paterlt No. 349,660, dated September 21, 1886.

Application filed May (l, 1886. Serial No; 201,394. (ModeL) To all whom, it may concern:

Be it known that 1, LA VERNE W. NoY s,

a citizen of the United States, residing at Chi-' reference being had to the accompanying draw- 1 ings, forming part thereof, wherein Figure 1 is a rear elevation. speetive of one of the sliding supports. Fig. 3 is a vertical section through the slide-bearing of the sliding supports and the slide-arms therein. I I

This invention is designed to be an improvement upon a book -holder for which there was granted to me apatent, No. 335,085, dated January 26, 1885.

It consists in providing a spring to uphold the book-shelves, tending to close them together and clamp the book, andin making the horizontal slides, on the outer ends of which the shelves are pivoted, triangular in cross section, or having their contiguous faces oblique to the line of pressure applied by the clamping-screw, so that when clamped by said screw they shall tend to bind on all sides against the bearing, in which they are thus clamped, and thus be prevented from gaining play in the plane of their contiguous faces, whereby, sometimes, I have found the clampscrew gradually loosened and the effectiveness of the clamp destroyed.

- A is the central support, composed of the two members A and A", pivoted together. The member A terminates below in a spindle, A whereby it is adapted to be connected to an upright standard. The screw A serves to lock the two members A and A together at any desired inclination. This structure is not 1 herein claimed, because it is claimed in my patent above mentioned. The member A of the central support has the back-support A and underneath it the transverse rectangular aperture constituting a slide-bearing, A, and screwed through the front wall. of said slidebearing the elampscrew B.

C C are brackets, which support the folding shelves D D. They are themselves supported by having their horizontal arms-C passed through the slide-bearing A, being i11- Fig. 2 is a persorted one from each side, and lying in contact and clamped by the clamp-screw B. In order that said clamping may render them tight in said slide-bearing vertically as well as horizontally-that is, may causethem to bind against the top and bottom walls of the bearing, as well as against the rear wall and against the clampscrew in front-I bevel their contiguous faces, C, as seen in Fig. 3, preferably cutting from. corner to corner, and leaving them each right angled triangular in cross-section, as shown. They are thus caused to slide, the one up against the top wall'and the other down against the bottom' wall of the bearing, so far as there is play in that direction, while they are clamped to gether by the clampscrew forcing them back against the rear wall. The brackets C have horizontal spindles constituting the shelf-pivots C and the stop-tooth C and in the same vertical trausverse'plaue with the latterthe catch or rigid tooth C". The shelvesD are secured to the shelf-plates DD, which have the pivot-bearings D for the shelf-pivots C and the pivot-bearings also for the latches E E. Said latches terminate at one end in the thumb pieces E and at the other end in the hooks or catches Said hooks E are adapted to en-- gage the stop-teeth C and the catches C", as seen in Fig. 1, wherein one shelf is raised, showing the latch engaged with the toot-h C, and the other shelf is horizontal, showing the latch engaged with the catch 0*.

Around the spindles C are coiled the springs F, stopped at one end against the lug c on the bracket and at the other end against the stop d on the shelf-plates. The springs are coiled, so that they tend to throw the shelves up, folding them together in vertical position, so as to clamp between them the book, which rests its back upon the back-support A The length of the latch and the position of the hook E is such that it engages the stop-tooth C at the position when the shelf is vertical, and engages the catch 0* at the position when the shelf is I locked in both directions, and when they stand vertical the engc gement of the hook E about l the spindles C to the tooth C also looks them in both directions. A spring, G, is provided, acting against the latches, tending to cause them to engage with 5 the stop-tooth C and with the catch 0*.

I claim 1. In combination with the shelf-plates and the brackets having the shelf-pivots C and the catches 0*, the springs stopped against the plates and against the brackets, and tending to fold the shelves up toward each other, and the latches E, pivoted on the shelves and engaging the catches on the brackets, substantially as set forth.

2. In combination with the shelf-p1ates and the brackets havin the shelf-pivots, the catches 0* and the stops 0, the springs tending to fold the shelves up toward each other, and the latches on the shelves on gagi ng the catches when the plates meet the stops, substantially as set forth.

3. In combination with the central support and the horizontal ly-sliding brackets sustained thereby, having the shelf-pivots and the catches O, the springs stopped against the shelf-plates and against the brackets and tending to fold the shelves up together, and the latches on the shelves engaging the catches, substantially as set forth.

4. In combination with the brackets having the shelf-pivots, the stop-tooth G and the catch 0*, the shelf-plates pivoted thereon and pro vided with the springs to throw them up, and the latches pivoted on the shelves and having 5 the notch to engage the tooth 0 when the shelves are folded and the catch 0 when they are open, substantially as set forth.

5. In combination with the brackets having serve as pivot-bearings for the shelves, the shelves pivoted thereon, and the springs coiled around the spindles and stopped at one end against the bracket and at i the other end against the shelves, and tending to fold the shelves together, and the means for fastening the shelves open, substantially as set forth.

6. In combination with the central support having the transverse slide-bearing for the shelf-sustainin g brackets and provided with the cl amp -screw, the shelt sustainin g brackets having their slide-arms in contact within said slide bearing, the contiguous faces of said arms being oblique to the direction of pressure exerted by the clamp-screw, substantially as set forth.

7. In combination with the central support having the parallel sided transverse slidebearing, and provided with the clamp-screw B, the shelf-sustainin g brackets having their slide arms in contact within said slide-bearing, said slide-arms having oblique faces in contact, substantially as set iorth.

S. In combination with the pivoted shelves rocking upward and toward each other from their horizontal position, springs reacting against stops rigid with the shelt pivots and tending in all positions of the shelves to fold them together, and l ockin g devices to hold them horizontal against the reaction of said springs, substantially as set forth.

Signed at Chicago, Illinois, April 26, A. D. 1886.

LA vnnnn w. Norris.

Attcst:

Gems. S. BURTON, FRANCIS W. PARKER. 

